首页
登录
职称英语
After going over some basic about hearing, the teacher will lead the students to
After going over some basic about hearing, the teacher will lead the students to
游客
2023-11-10
32
管理
问题
After going over some basic about hearing, the teacher will lead the students to
I’m glad to see so many of you here. We’ve become really alarmed over the health center by the number of students we are seeing, who are experiencing hearing loss. (7) First, I want to go over some basic about hearing. Then we can take a look at our school environment and see if we can figure out some ways to protect hearing. (8) The leading cause of preventable hearing loss is excessive noise. Too much moderate noise for a long time or some types of intense noise for even a short time can damage hearing. Loudness is measured in units called decibels. One decibel is the lowest sound that the average person can here. (9) Sounds up to 80 decibels generally aren’t harmful. That’s noise like traffic on a busy street. But anything louder than 80 decibels, especially with continuous exposure, may eventually hurt your hearing. (10) Once you are up to around 140 decibels, that’s like a jet plane taking off, then you might even feel pain in your ears. And pains are sure sign that your hearing’s at risk. Even one exposure to a really loud noise at close range can cause hearing loss. So what you need to do is limit your exposure to harmful levels. If you pass along this handout, we can take a look at the decibel level of some common campus sounds. Notice how loud those horns are that people take to football games. They are really dangerous if blown right behind you. Now, let’s try to generate a list of damaging noises.
选项
A、put the theory learned into practice.
B、finish and check their homework.
C、solve some academic problems.
D、cure people who are experiencing hearing loss.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3173506.html
相关试题推荐
Howmanystudentsreceivedanadmissione-mailfromtheUniversityofCalifornia
Teachersneedtobeawareoftheemotional,intellectual,andphysicalcha
Teachersneedtobeawareoftheemotional,intellectual,andphysicalcha
Teachersneedtobeawareoftheemotional,intellectual,andphysicalcha
Teachersneedtobeawareoftheemotional,intellectual,andphysicalcha
Teachersneedtobeawareoftheemotional,intellectual,andphysicalcha
Teachersneedtobeawareoftheemotional,intellectual,andphysicalcha
Teachersneedtobeawareoftheemotional,intellectual,andphysicalcha
Teachersneedtobeawareoftheemotional,intellectual,andphysicalcha
Teachersneedtobeawareoftheemotional,intellectual,andphysicalcha
随机试题
WhichofthefollowingisINCORRECTaboutLosAngeles?[originaltext]W:Hello,F
Mr.Smithbecamevery______whenitwassuggestedthathehadmadeamistake.A、in
[originaltext]Cleanairisimportanttogoodhealth.Iftheaircontainsimpuri
信息系统工程是代表高科技的工程,尤其是在信息化技术快速发展的当下时期,对监理开展
某大学拟建设无线校园网,委托甲公司承建,甲公司的张工带队去进行需求调研,获得的主
心理状态是指人在某一时刻心理活动水平。以下属于心理状态是( )A.勤劳 B.
在建设工程项目总进度目标论证过程中,项目的工作项编码之前需要完成的工作有()
根据《公安机关人民警察职业道德规范》规定,民警下列做法正确的是:A.民警肖某按照
证券公司不可以以自有资金参与本公司设立的集合资产管理计划。()
下列关于深圳的地理位置描述不正确的是()。 A.东临大亚湾和大鹏湾 B.南
最新回复
(
0
)